Genital acetabula many pairs; female genital field with two pairs of acetabular plates; each anterior female acetabular plate with a very elongate, inner flap that is heavily sclerotized and bears one or two, short, thick, spinous, setae; posterior female plate modified and resembling that of Polyatax; pedipalp subcylindrical and well-sclerotized with tarsus rectangular and somewhat elongate with large, obvious clawlets; dorsum with obvious dorsal plates; male genital field as in Polyatax; male fourth walking leg apparently unmodified; bifid tarsal claws in all walking legs, while tarsal claws of second and third walking legs are obviously bifid to a lesser degree than those of the first and fourth walking legs; coxal plates with indistinct borders.

Male and female genital fields with five or six pairs of acetabula and resembling those of subgenus Unionicola; pedipalps slightly elongate and resembling those of subgenus Unionicolides Lundblad, 1937; first walking leg with a distinctive setal pattern that is less setose than that of the subgenus Unionicola.

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